[1990s+] (US Und.) crimes committed inside prison by a serving prisoner who is tried in a normal court rather than facing internal prison discipline; such crimes include murder, escape, sex- or drug-related offences; also as v.

take beef
(v.)

[1990s+] (US black) to get into arguments, to face criticism.

where’s the beef?[slogan for Wendy’s hamburgers in 1984 + play on SE beef]